The gap staring back at you
You pulled the old faucet off the sink expecting a simple swap, and now you're looking at three holes in the countertop or the sink deck, with one shiny new single handle faucet base that only needs one. That extra real estate doesn't just disappear. It has to be dealt with, and how you deal with it says a lot about whether the job ends up looking finished or looking like a patch.
This comes up constantly in Republic, especially in the ranch-style and split-level homes built through the 70s, 80s, and 90s around town, where three-hole sink setups were standard. If you're renovating a kitchen in one of the older homes near downtown or updating a bathroom in a house off Highway 174 or out toward Battlefield, you're probably running into this exact situation right now.
What the extra holes were for
Three holes usually meant a separate hot handle, cold handle, and spout, or a single faucet plus a side sprayer and soap dispenser combo. When you switch to a single handle faucet, it typically only needs one hole, sometimes two if it includes a side spray. That leaves you with one or two holes that need a cover plate, called an escutcheon or deck plate, to close the gap cleanly.
Most single handle faucets sold today come with this plate included, but check before you assume. Some manufacturers sell it separately, and if you bought your faucet online without seeing it in person, this is worth confirming before you're standing at the sink with a hole you can't cover.
More on this from What Changes When A Three Hole Sink Gets A Single Handle.
Why the sink material matters here
Republic has a good mix of older enamel cast iron sinks, stainless steel, and newer composite granite sinks depending on when the house was built or last remodeled. Each one handles a leftover hole differently. Stainless steel is forgiving, a deck plate sits flush and looks intentional. Cast iron and enamel sinks from the 60s through the 80s sometimes have holes that are slightly different sizes or spacing than modern hardware expects, so the plate you buy at a hardware store might not sit right without some adjustment.
If your sink is original to an older home, measure the hole spacing before buying anything. A quarter inch off doesn't sound like much, but it's enough to make a plate rock or leave a visible gap where grime collects.
What our seasons do to old caulk and seals
Southwest Missouri swings from humid summers to freezing winters, and that temperature swing is hard on any seal around a sink deck plate or faucet base. Caulk that looked fine in October can crack by February once the house has gone through a few freeze-thaw cycles, especially in a kitchen on an exterior wall where the countertop gets colder than the rest of the room.
This matters more with the leftover holes than people expect. A poorly sealed deck plate lets water sit in a hole that was never meant to be watertight long term, and that water finds its way under the sink deck or into cabinet wood below. In a region where humidity is already an issue for cabinet interiors, this is exactly the kind of slow leak that goes unnoticed until the particleboard under the sink starts to swell.
What you can check yourself
You can absolutely handle the basics. Measure your existing holes, confirm what your new faucet needs, and buy a deck plate that matches the sink finish, not just the faucet finish, since a mismatched shine is the kind of thing you notice every time you do dishes. Dry fit the plate before you commit to caulk or plumber's putty, and make sure it sits flat with no rocking.
Where this stops being a weekend project is when the hole spacing doesn't match anything sold locally, when the sink material is old enough that drilling or modifying it risks cracking it, or when you find soft wood or water staining under the sink once you pull the old fixture. At that point you're not just installing a faucet, you're dealing with sink replacement or cabinet repair, and that's worth a plumber's opinion before you make it worse.